Leonard Nimoy, who played Mr Spock in science fiction series Star Trek, has died. He was 83. The actor, who won worldwide fame as the ever-logical, half-Vulcan first officer of the Starship Enterprise, passed away on Friday morning at his home in Los Angeles. His unflappable character's split-fingered salute and blessing, "Live long and prosper", was imitated by generations of devoted fans. Nimoy's death was confirmed to the New York Times by his wife, Susan Bay Nimoy.

The first known photograph has emerged of Mohammed Emwazi - the Islamic State militant known as "Jihadi John" - as an adult. Showing him with a goatee beard and wearing a Pittsburgh Pirates baseball cap, the image is revealed in student records from his time at the University of Westminster. It comes after the 26-year-old who became the masked face of the notorious terror organisation was identified as the figure seen in several videos of hostages being beheaded.